Yuuri shudders when he does. This part he knows at least a little about, might be a virgin but hasn't been completely chaste, not in America, not in college, but this is different, doing this here, like this, with Minami. He's not sure which part of this makes this different, but it is, all the same.

Someone could theoretically come in. They really should stop this.

Yuuri doesn't stop this. They're too awkwardly placed on the benches to do much exploring if they don't want to either drop the cake or fall off the bench, but he's pouring all of that into the kiss, instead, heating it.